Ross the Jewellers received an uncut diamond from Wainwrights worth £50,000. They polished it and courier, Jessica Roberts was taking it to Jonathan French to be cut. A car pulls up and a man steals the diamond. Mark Saber is called in.
Sam Hawtrey falls down a flight of stairs leaving him paralised. Acme Insurance Company believe he is faking but are willing to pay £2,000 in good faith. Hawtrey turns the offer down so Acme boss Mr. Robinson calls Mark Saber to find out.
American Kim Muller arrives in Britain to work for lecturer Mr. Harding. She finds his dead body but knocked unconscious. No body is found and his housekeeper says he is in Scotland. Mark Saber offers to help when Harding is found shot.
The body of Dora Daine is discovered, by the police. This is the third murder of it's kind and is known as the "Full Moon Murders". The suspect "John Smith" has many alias's. Ann learns he is now in Brighton using the name Captain Brigham.
William Pelham, the accountant for Inter Dominion Builders jumps to his death. It's called suicide and his family will get nothing, once his gambling debts are paid. Mark Saber believes it's murder and sets a trap to smoke out the killer.
After a man aggressively bargains for a uninteresting jewel case, Mark Spencer must find out the significance of the jewel cases after an antiques dealer is found dead.
Michael Gerard is selling forgeries and getting Jim Peters to paint them. When Peters disappears his wife contacts Mark Saber for help. Gerard is planning to steal the Madonna from the Grosvenor Art Gallery and replace it with Peters copy.
Martin Haigh is struggling to come to terms with the death of his wife in a plane crash and is fixated with survivor Capt. Glen Ramsey. When Ramsey returns home, he discovers his room wrecked and his dog killed. Mark Saber is called in.
